High alumina bricks are silicate aluminum refractory bricks with an Al2O3 content of not less than 75%. The production process is similar to clay refractory bricks. Depending on the different grades and quality requirements of bauxite clinker used, as well as the selection of formula binders and appropriate proportions, they are formed using a brick press and calcined.
Our company's high alumina bricks are made of well calcined rotary kiln GL-70 raw materials, with a volume density of 3g/cm ³ The above advantages include a water absorption rate of less than 5%, high sintering temperature, and low content of Na2O and K2O. At the same time, an appropriate amount of mullite is added to strengthen the matrix, and the high-temperature volume effect of some natural minerals is utilized to achieve the characteristics of high load softening temperature, high high-temperature flexural strength, and low thermal expansion rate of the product.
Application fields of high alumina bricks: mostly suitable for blast furnaces, hot blast furnaces, electric furnaces, cupolas, coke ovens, soaking furnaces, heating furnaces, off road refining furnaces, rotary kilns, and various industrial kiln linings, flues, smoke chambers, etc.
| Item | AL2O3 ≥ | Fe203 < | Volume Density | Compressive Strength > | Load Softening Temperature | Fire Resistance > | Apparent Porosity< | Line change rate |
| High alumina Molded Refractory Brick | 75% | 2.5% | 2.5g/cm ³ | 70MPa | 1510℃ | 1790℃ | 22% | -0.3% |
Copper crystallizer/cooler upcast furnace
